Bolt anchor



March 18, 1924. 7 1,487,290

v c. C.--TOMKINSON BOLT ANCHOR Filed Aug. 11. 1921 12v VEN'TOR mar/e5 ({Twmfmawz A TTORNEY Patented Mar. 18, 1924.

UNITED STATES PATENT OFFICE.

CHARLES C. TOMKINSON, OF PLAINFIELD, NEW JERSEY. ASSIGNOR TO JOHN EDWARD OGDEN, OF MOUNTAINVILLE, NEW YORK.

BOLT ANCHOR.

Application filed August 11, 1821. Serial No. 491,888.

To all whom it may concern:

Be it known that I, CHARLES C. TOMKIN- son, a citizen of the United States, and a resident of Plainfield, county of Union, and State of New Jersey, have invented certain new and useful Improvements in Bolt Anchors, of which the following is a specification.

This invention relates to bolt anchors such were used in walls of brick, stone, cementitious or other material not adapted to di rectly receive a threaded member.

One of the objects of the invention is to provide an anchor having hard and soft metal parts so constructed and arranged that the hard metalparts will be deformed and expanded by the soft metal into engagement with the wall of the opening in whlch the anchor is located.

One of the objects of the invention is to provide an anchor having hard and soft metal parts so arran ed that the soft metal will be forced throng openings in the hard metal into en agement with the wall of theopening in a dition to expanding the hard metal.

Another object of the invention is to provide an anchor comprising a hard metal shell and a soft metal expanding element, the shell having means for assisting in directing the movement of the soft metal when the latter is pressed or acted on by a thread member or bolt.

Further objects of the invention will appear from the following specification taken 1n connection with the drawings which form a part of this application. 7

Referring to the drawings, Fig. 1 is an elevational view of an expansion shield constructed in accordance with my invention.

Fig. 2 is an end elevation of the outer end of the shield shown in Fig. 1.

Fi 3 is a sectional elevation taken substantlally on line 3-3 of Fig. 1.

Fig. 4 is a sectional elevation of the shield shown in Fig. 1.

Fig. 5 is a transverse sectional view taken substantially on line 55 of Fig. 4.

Fig. 6 is a sectional elevation of a shield shown in Fig. 1 but taken at right angles to the section shown in Fig. 4.

Fig. 7 is a sectional elevation of the bolt anchor showing the anchor in expanded potaken substantially on line 8--8 of Fig. 7.

Fig. 9 is a sectional elevation of the construction shown in Fig. 7, but taken substantially at right angles to Fig. 7.

Fig. 10 is an elevation of another form so of shield constructed in accordance with my invention, and

Fig. 11 is a transverse sectional elevation taken substantially on line 111 1 of Fig. 10.

The invention may be briefly described as as comprising a one piece shield of relatively hard metal having a body portion and a closed bottom, these parts being connected by deformable members. A soft metal filler is positioned in the shield and to the bottom of the shield is constructed to direct the flow of this metal laterally when the metal is engaged by the shield member or bolt and is forced by this member in such a direction as to deform the connecting members between the bottom and body portion and to pass outwardly in the openings between the connecting members. lln tile particular form of the invention shown t e recting the flow of the metal which is acted on by the bolt. The shield is also provided with outwardly projecting lugs for preventing the rotation of the shield.

Like characters of reference designate coras responding parts in all the views of the drawings.

The shield constructed in accordance with my invention comprises a body portion 20,

a ottom 21 and deformable stri s 22 which no connect the body portion to the ttom. A plurality of In 23 is formed on the outer wall of the ho y portion 20 and these lugs prevent the rotatlon of the shield in the wall opening. The bottom 21 has an inner at surface 24 conical in shape, or, expressed in other words, the surface 24.- forms an acute angle with the inner wall of the shield for a purpose hereinafter set forth.

The other end of the shield has a threaded opening 25 for receiving a bolt or other threaded element,

A soft metal filler or expandin element 26 is positioned in the shield at t e bottom ottom is conical in shape thereby dic or inner end, preferably, being cast thereinforce the filler laterally through the openings 27 between the strips 22 and this movement of the soft metal will also deform the strips 22 forcing them laterally into engagement with the wall opening as shown part1cularl in Fig. 9. This flow of the softmeta is directed and assisted by the conical bottom surface 24.

In Figs. 10 and 11 another form of the invention is shown and in this form each of the strips 22 has formed thereon one or more outwardly extending ribs 29 and when the strips 22 are deformed the ribs will be pressed into firm and tight engagement with the wall opening thereby assisting in retaining the shield in place,

From the above description, it will be seen that an exceedingly firm .and secure anchorage may be obtained by utilizing the construction described and furthermore that the construction 'is simple, practical and comprises few parts. v Although certain specific embodiments of the invention have been illustrated and described, it will be understood that the invention is capable of further modification and that changes in the construction and in the arrangement of the various cooperating parts may be made without departing from the spirit or scope of the invention as expressed in the following claims.

What I claim is: x

1. An anchor comprising a one piece expansion shield of relatively hard metal and having expansible elements and an expanding element consisting of a mass of relatively soft metal positioned within said shield and substantially filling the space between said expansible elements.-

2. An anchor comprising a one piece expansion shield of relatively hard metal .and having expansible elements and perforations and an expanding element of relatively soft metal positioned within said shield .and ada ted to expand said elements and to exten through the perforations.

3. An anchor comprising a one piece expansion shield of relatively hard metal and having expansibleelements, an expandin element of relatively soft metal positioned within said shield, and means for directing the flow of the soft metal laterally as the expanding element is compressed.

' 4. An anchor comprising a one piece expansion shield of relatively hard metal and 6. In an anchor, a shield havin a closed bottom, spaced strips connecting t e bottom to the body of the shield, a soft metal expanding element positioned in the shield adjacent the bottom and substantially filling the shield within the strips, and means" carried by the bottom of the shield for directing the soft metal laterally through the spaces between the strips and against the strips as the soft metal element is com:

pressed.

7. In an anchor, a shield havin a closed bottom, spaced strips connecting t e bottom to the body of'the shield and a soft metal expanding element positioned in the shield adjacent the bottom and substantially filling the shield within the strips, said bottom 'having an inwardly extending conical surface for directing the soft metal laterally as the expanding element is compressed.

8. A perforated expansion shield having a closed bottom provided with a surface inclined to the wall of the shield.

9. A- one piece perforated expansion shield having a closed bottom provided with a surface inclined to the wall of the shield. 10. A one piece expansion shield havin spaced, lon itudinal, deformable strips an a soft meta mass disposed adjacent to and adapted to deform said strips.

11. In combination a one piece ex nsion shield having spaced, longitudinal, eformable strips, and a soft metal ex anding'element in the shield and adapte to deform the strips."

12. A- one piece expansion shield of relatively hard metal comprising a body portion, a closed bottom and a plurality of spaced longitudinal strips connecting the body portion to the bottom.

Ill

13. A one piece expansion shield of relatively hard metal comprising a body rtion, abottom and a plurality of spaced ongitudinal strips connecting the ody portion to the bottom, said bottom havln an inwardly extending portion having sur aces I forming an acute angle with the wall of the shield.

14. A one piece ex ansion shield having a closed bottom and aving perforations in the wall adjacent the bottom, the bottom having an inner surface formin an acute angle with the wall of the shiel Ill 15. A one piece expansion shield having a closed bottom and having erforations in the Wall adjacent the bottom, t e bottom having a conical inner surface.

16. A one piece expansion shield of relatively hard metal comprising a body portion, a closed bottom and a plurality of spaced, lon itudinal, ribbed strips connecting the ho y portion to the bottom.

17. A one piece expansion shield of relatively hard metal comprising a body portion, a closed bottom and a plurality of spaced, longitudinal strips connecting the body portion to the bottom, said strips having transverse outwardly projecting portions.

18. An anchor comprising a one iece expansion shield of relatively har metal,

aving a threaded bolt-receiving portion and having expansible elements and an expandin element of relatively soft metal p0- sitione within said shield and transversely filling the space between said expansible elements. 1

19. An anchor comprisin a one piece expansion shield of relatively ard metal, havmg a bolt receiving opening and having expansible elements and an expanding element consisting of a mass of relatively soft metal extendin across the path of a bolt positioned in t e bolt receiving opening.

20. An anchor comprising a one piece expansion shield of relatively hard metal havmg a threaded opening for receiving a bolt and having lateral openings and an expand ing element of relatively soft metal disposed in the ath of movement of a bolt p0- sitioned in tlie threaded opening and in a position to pass through the lateral openmgs.

21. An anchor comprisin a one piece expansion shield of relative y hard metal, having a bolt receiving opening and a closed end opposite said 0 ening and having expansible elements and an expanding element consisting of a mass of relatively soft metal disposed in said closed end and in the bolt receiving opening.

22. In an anchor, a shiel having a closed bottom and lateral openings adjacent the bottom and a soft metal expanding element positioned in the shield adjacent the bottom.

23. In an anchor, a shield having aclosed bottom and lateral openings and expansible portions adjacent the bottom and a soft metal expanding element positioned in the shield adjacent the bottom.

In witness whereof, I have hereunto set my hand this 3rd day of August, 1921.

Witness:

I. B. Moon. 

